graflow: improved ortho walkarounds

bzGraflow.js

@@ -459,7 +459,7 @@ class BZgraflow extends Buildoz{
         return({ x: x - r.left, y: y - r.top })
     }
 
-    buildSegment(x1, y1, c1x, c1y, c2x, c2y, x2, y2, wireType, dir1, dir2, loop=false){        
+    buildSegment(x1, y1, c1x, c1y, c2x, c2y, x2, y2, wireType, node1, node2, dir1, dir2, tension, loop=false){        
         if(loop) wireType = 'bezier' // loops only use bezier to look good
         
         const startAxis = ['n', 's'].includes(dir1) ? 'v' : 'h'
@@ -476,6 +476,16 @@ class BZgraflow extends Buildoz{
                 if( ((dir1 == 's') && (c1y < mediany)) || ((dir1 == 'n') && (c1y > mediany)) ){ 
                     if( (dir2=='e') && (c2x > x1) || (dir2=='w') && (c2x < x1)) return(`V ${mediany} H ${c2x} V ${y2} H ${x2}`)
                     else if((dir2=='e') || (dir2=='w')) return(`V ${y2} H ${x2}`)
+                    else if(dir2 == dir1) { // walk-around node
+                        const deviation = node2.offsetWidth / 2
+                        if(x1>x2) {
+                            if(x1>x2+deviation+tension)  return(`V ${c2y} H ${x2} V ${y2}`)
+                            else return(`V ${c1y} H ${x1+deviation+tension} V ${c2y} H ${x2} V ${y2}`) 
+                        } else {
+                            if(x1<x2-deviation-tension)  return(`V ${c2y} H ${x2} V ${y2}`)
+                            else return(`V ${c1y} H ${x1-deviation-tension} V ${c2y} H ${x2} V ${y2}`) 
+                        }
+                    }
                     else return(`V ${mediany} H ${c2x} V ${y2} H ${x2}`)
                 } else {
                     return(`V ${c1y} H ${medianx} V ${c2y} H ${x2} V ${y2}`)
@@ -485,7 +495,16 @@ class BZgraflow extends Buildoz{
                 if( ((dir1 == 'e') && (c1x <medianx)) || ((dir1 == 'w') && (c1x > medianx)) ){                     
                     if( (dir2=='s') && (c2y > y1) || (dir2=='n') && (c2y < y1)) return(`H ${medianx} V ${c2y} H ${x2} V ${y2}`)
                     else if((dir2=='n') || (dir2=='s')) return(`H ${x2} V ${y2}`)
-                    else return(`H ${medianx} V ${c2y} H ${x2} V ${y2}`)
+                    else if(dir2 == dir1) { // walk-around node
+                        const deviation = node2.offsetHeight / 2
+                        if(y1>y2) {
+                            if(y1>y2+deviation+tension)  return(`H ${c2x} V ${y2} H ${x2}`)
+                            else return(`H ${c1x} V ${y1+deviation+tension} H ${c2x} V ${y2} H ${x2}`) 
+                        } else {
+                            if(y1<y2-deviation-tension)  return(`H ${c2x} V ${y2} H ${x2}`)
+                            else return(`H ${c1x} V ${y1-deviation-tension} H ${c2x} V ${y2} H ${x2}`) 
+                        }
+                    } else return(`H ${medianx} V ${c2y} H ${x2} V ${y2}`)
                 } else {  
                     return(`H ${c1x} V ${mediany} H ${c2x} V ${y2} H ${x2}`)
                 }
@@ -529,7 +548,7 @@ class BZgraflow extends Buildoz{
                 c2y -= 1*tension
             }
         }
-        const seg = this.buildSegment(x1, y1, c1x, c1y, c2x, c2y, x2, y2, wireType, port1.direction, port2.direction, loop)
+        const seg = this.buildSegment(x1, y1, c1x, c1y, c2x, c2y, x2, y2, wireType, node1, node2, port1.direction, port2.direction, tension, loop)
         if(!seg) return('')
         return(`M ${x1} ${y1} ${seg}`)
     }
@@ -546,12 +565,12 @@ class BZgraflow extends Buildoz{
             return('')
         }
 
-        const makeSegment = (x1, y1, x2, y2, dir1, dir2) => {
+        const makeSegment = (x1, y1, x2, y2, node1, node2, dir1, dir2, tension) => {
             const c1x = Math.floor(x1 + (this.dirVect[dir1].x * tension))
             const c1y = Math.floor(y1 + (this.dirVect[dir1].y * tension))
             const c2x = Math.floor(x2 + (this.dirVect[dir2].x * tension))
             const c2y = Math.floor(y2 + (this.dirVect[dir2].y * tension))
-            return(this.buildSegment(x1, y1, c1x, c1y, c2x, c2y, x2, y2, wireType, dir1, dir2, false))
+            return(this.buildSegment(x1, y1, c1x, c1y, c2x, c2y, x2, y2, wireType, node1, node2, dir1, dir2, tension, false))
         }
 
         // Start/end points in SVG coords (works for both bezier and line)
@@ -585,10 +604,10 @@ class BZgraflow extends Buildoz{
             let y2 = Math.floor(entry.y)
 
             if(firstPort){
-                path += makeSegment(x1, y1, x2, y2, firstPort.direction, entryDir)
+                path += makeSegment(x1, y1, x2, y2, node1, node2, firstPort.direction, entryDir, tension)
                 firstPort = null
             } else {
-                path += makeSegment(x1, y1, x2, y2, exitDir, entryDir)
+                path += makeSegment(x1, y1, x2, y2, node1, node2, exitDir, entryDir, tension)
             }
 
             const x3 = Math.floor(exit.x)
@@ -598,7 +617,7 @@ class BZgraflow extends Buildoz{
             x1 = x3
             y1 = y3
         }
-        path += ' ' + makeSegment(x1, y1, xEnd, yEnd, exitDir, port2.direction)
+        path += ' ' + makeSegment(x1, y1, xEnd, yEnd, node1, node2, exitDir, port2.direction, tension)
         return(path)
     }
 
@@ -1101,6 +1120,7 @@ class MovingNodes{
     pointerDown(e){
         this.graflow.clearFakeNodes()
         const node = (e.target.classList.contains(this.itemSelector)) ? e.target : e.target.closest(this.itemSelector) 
+        if(!node) return
         const handle = (node.classList.contains(this.handleSelector)) ? node : node.querySelector(this.handleSelector) 
         
         const rect = node.getBoundingClientRect()